In video clip A (upper panels), the confederate first looks directly into the camera (A0). After 5 seconds, the confederate frowns and smiles and then resumes looking into the camera (A5). After 15 seconds, the confederate laughs and then resumes looking into the camera again (A15). Finally, after 25 seconds the confederate winks and smiles. In video clip B (lower panels), the confederate first looks directly into the camera with a neutral expression (B0). After 10 seconds (B10), the confederate averts his gaze to the right for about 5 seconds. Then, after 20 seconds, the confederate briefly closes his/her eyes and then looks back into the camera again (B20).